diff --git a/flaschengeist/modules/auth_ldap/__init__.py b/flaschengeist/modules/auth_ldap/__init__.py
index ef48869..1ed906b 100644
--- a/flaschengeist/modules/auth_ldap/__init__.py
+++ b/flaschengeist/modules/auth_ldap/__init__.py
@@ -85,7 +85,7 @@ class AuthLDAP(AuthPlugin):
 
     def modify_user(self, user: User, password, new_password=None):
         try:
-            dn = user.attributes["DN"].value
+            dn = user.get_attribute("DN")
             if password:
                 ldap_conn = self.ldap.connect(dn, password)
             else: